A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . t of a superficialset common to both sides and of deeper fibers properto each. The superficial fibers run transversely, beingbest developed on the anterior surface, and some ofthem turn in at the auricular septum. Of the deepfibers, some pass over the auricle in the form of an openloop to be attached at both extremities to the auriculo-ventricular ring; these are called looped , known as annular fibers, encircle theauricular appendages and surround the
A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . t of a superficialset common to both sides and of deeper fibers properto each. The superficial fibers run transversely, beingbest developed on the anterior surface, and some ofthem turn in at the auricular septum. Of the deepfibers, some pass over the auricle in the form of an openloop to be attached at both extremities to the auriculo-ventricular ring; these are called looped , known as annular fibers, encircle theauricular appendages and surround the openings ofthe vena; caviB and pulmonary veins. The complexnature of the arrangement of the fibers in the ventriclesappears from the fact that a vertical section of theirwalls taken at almost any point shows the fibers on the outer surface crossing the direction of those onthe inner, while between these every intermediatedirection may be represented. The left ventriclepossesses a much more powerful nnisculature thanthe right ventricle, but, as in the case of the auricles,a large number of fibers are common to both; in fact,. Fia. 726.—Cross-section of a Completely Contracted HumanHeart, at the Level of the Lower and Middle Third. (Accordingto Krehl.) the outer wall of the right ventricle is so largely madeup of fibers coming from the left that the formerappears in sections of the heart like a cleft or pocketin the wall of the latter (see Fig. 726). Schemat-ically, the fibers may be described as falling into anumber of more or less well-defined groups accordingto the general direction of their course. The super-ficial oblique fibers constitute the first of these groups.
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Keywords: ., bookauthorbuckalbe, bookcentury1900, bookdecade1910, bookyear1913
